$ cat sign.txt.asc¶ -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Can you verify this signature? -----BEGIN PGP SIGNATURE----- iQHEBAEBCAAuFiEErZY9ITQEgJGEJGgD5I2lhvLKjakFAmCo0p8QHHJlcG9ydEBq b2hvLm9yZwAKCRDkjaWG8sqNqa8tDACbTXDAl1Sz9AiX0Hsc/Hx/JFU3VSMGWURK NLIubOREIs5rcOS7sRCrrPwMGzDPEqvP88OSrfeyqv9HZdUuslI9KnuBKB8yG15n F7vgTFCYquANEwUxEZxH9C1ASUvQohoYUQKTCwosZB792pEyFtDeuxCqOdizoqg5 PFGH8rJfAlKTJdnmD6FYVIJAYPj6ZZ2ANyt/17M3drE5beOpHsq+k63gIrIdJtJH f8Ub0mp5H8/LWiji748gZPVs5okmxbYTLtuH4kCyN2Pszm8raUl5y/TBsbfs1b8u JnR0epJP6l8LzirPE92euwMQBXM0vkwtHqtGSANm5B5PuYrYGvRzfw0IVjEu6lFn ndRDWes7nfNKDbh7w4A+2xVetXT2JVOuuafq1ELUXwQ7Gf9Gil/D9UY1h5D4uESe 9IJOERl1t/p+O205MGfzKvySiP/BT7OlXI56nhq8lBcRN9FXNoLeO3MnhR8qA6On WYaJEJ34h8bodxEzpDYnuDIoVfAbJ5M= =hbEY -----END PGP SIGNATURE----- $ gpg --verify sign.txt.asc¶ gpg: 土 5/22 18:45:03 2021 JSTに施された署名 gpg: RSA鍵AD963D213404809184246803E48DA586F2CA8DA9を使用 gpg: 発行者"report@joho.org" gpg: 署名を検査できません: 公開鍵がありません $